I'm seeing the same behaviour on 16.04.3 LTS.
A quick test using 14.04 suggests that the 3.16 kernels work without issue whilst 3.19 and later display the reported behaviour when writing to Windows Server 2016 iSCSI targets
I'm seeing the same behaviour on 16.04.3 LTS.
A quick test using 14.04 suggests that the 3.16 kernels work without issue whilst 3.19 and later display the reported behaviour when writing to Windows Server 2016 iSCSI targets